/Engine/Plugins/Media/ElectraCodecs/Source/ElectraDecoders/Public/IElectraDecoderOutputAudio.h
Channel position as per ISO/IEC 23001-8 Table 7.
enum EChannelPosition { Invalid = -1, L =0, R, C, LFE, Ls, Rs, Lc, Rc, Lsr, Rsr, Cs, Lsd, Rsd, Lss, Rss, Lw, Rw, Lv, Rv, Cv, Lvr, Rvr, Cvr, Lvss, Rvss, Ts, LFE2, Lb, Rb, Cb, Lvs, Rvs, Undefined = 128, Disabled = 255, Unspec0 = 256, Unspec1, Unspec2, Unspec3, Unspec4, Unspec5, Unspec6, Unspec7, Unspec8, Unspec9, Unspec10, Unspec11, Unspec12, Unspec13, Unspec14, Unspec15, Unspec16, Unspec17, Unspec18, Unspec19, Unspec20, Unspec21, Unspec22, Unspec23, Unspec24, Unspec25, Unspec26, Unspec27, Unspec28, Unspec29, Unspec30, Unspec31, }